Abstract : Contents: Plots of Measured Atmospheric Gas Concentrations NOP Site; Water vapor measurements at NOP Site during the period 10 April-28 April 1980; Nitrous oxide measurements at NOP site during the period 10 April-28 April 1980; Total Hydrocarbon measurements at NOP site during the period 22-24 April 1980; Carbon dioxide measurements at NOP site during the period 10 April-28 April 1980; and Ozone concentration measurements at NOP site during the period 10 April-28 April 1980.